check-integrity.c

	state = NULL;
	list_for_each_entry(device, dev_head, dev_list) {
		struct btrfsic_dev_state *ds;

		if (!device->bdev || !device->name)
			continue;

		ds = btrfsic_dev_state_hashtable_lookup(
				device->bdev,
				&btrfsic_dev_state_hashtable);
		if (NULL != ds) {
			state = ds->state;
			btrfsic_dev_state_hashtable_remove(ds);
			btrfsic_dev_state_free(ds);
		}
	}

	if (NULL == state) {
		printk(KERN_INFO
		       "btrfsic: error, cannot find state information"
		       " on umount!\n");
		mutex_unlock(&btrfsic_mutex);
		return;
	}

	/*
	 * Don't care about keeping the lists' state up to date,
	 * just free all memory that was allocated dynamically.
	 * Free the blocks and the block_links.
	 */
	list_for_each_safe(elem_all, tmp_all, &state->all_blocks_list) {
		struct btrfsic_block *const b_all =
		    list_entry(elem_all, struct btrfsic_block,
			       all_blocks_node);
		struct list_head *elem_ref_to;
		struct list_head *tmp_ref_to;

		list_for_each_safe(elem_ref_to, tmp_ref_to,
				   &b_all->ref_to_list) {
			struct btrfsic_block_link *const l =
			    list_entry(elem_ref_to,
				       struct btrfsic_block_link,
				       node_ref_to);

			if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
				btrfsic_print_rem_link(state, l);

			l->ref_cnt--;
			if (0 == l->ref_cnt)
				btrfsic_block_link_free(l);
		}

		if (b_all->is_iodone)
			btrfsic_block_free(b_all);
		else
			printk(KERN_INFO "btrfs: attempt to free %c-block"
			       " @%llu (%s/%llu/%d) on umount which is"
			       " not yet iodone!\n",
			       btrfsic_get_block_type(state, b_all),
			       (unsigned long long)b_all->logical_bytenr,
			       b_all->dev_state->name,
			       (unsigned long long)b_all->dev_bytenr,
			       b_all->mirror_num);
	}

	mutex_unlock(&btrfsic_mutex);

	kfree(state);
}